Egg-grading machine



Sept. 6, 1949. 0. PAGE EGG GRADING MACHINE Filed Dec 5 Sheets-Sheet 1 5. Sheets-Sheet 2 C. PAGE EGG GRADING momma Sept. 6, 1949.

Filed 1m. 27, 1946 7 led f/i yiee Sept. 6, 1949. c. PAGE EGG GRADING MACHINE 5 Shuts-Sheet 3 Filed Dec. 27. 1946 Snventor ce figs C/a-re attorneys Sept. 6, 1949. c, PAGE EGG GRADING MACHINE m Nu attorneys Sept. 6, 1949. c. PAGE EGG GRADING MACHINE 5 Sheets-Sheet 5 Filed Dec. 2'7, 1946 uHl l l l l l P lU bl I V l l I l l r 12:35] Fat r f i r z Chvyce Tags,

Clitornegs' Patented Sept. 6, 1949 EGG-GRADING MACHINE Clarence Page, Detroit, Mich, assignor to Page and Cox, Detroit, Mich., a corporation of Mich- Application December 2'1, 1946, Serial No. 718,755

Claims. (Cl. 209-121) This invention relates to machinery for grading articles and, in particular, to egg-grading machines.

One object of this invention is to provide an egg-grading machine which will grade eggsaccording to their weights in a rapid, emcient' and accurate manner by automatic mechanism which requires very little attention on the part of the operator.

Another object is to provide an egg-grading machine, as set forth in the preceding object, wherein the eggs need only be deposited upon the machine while in their containers, the machine thereafter automatically separating the eggs from their flllers" in which they are pocketed and their flats" which close the bottoms of the fillers.

Another object is to provide an egg-grading machine, as set forth in the preceding objects, wherein the eggs, after separation from their containers, are conveyed automatically to the egg-sorting portion of the machine and turned until their long axes are horizontal while being separated laterally into spaced rows of eggs.

Another object is to provide an egg-grading machine, as set forth in the preceding objects,

wherein the thus separated eggs are automatic ally picked up and conveyed one by one to suecessive weighing stations at one of which they are selected according to the weight of eg s at which the particular station is set to operate, the egg being conveyed to the next weighing station if it is rejected at agiven weighing station.

Another object is to provide an egg-grading machine, as set forth in the preceding objects, wherein the eggs are handled gently but swiftly at all stages, thereby preventing the breakage and consequent soiling occurring in prior machines or manual grading processes in which the eggs underwent treatment sufllciently rough to cause occasional breakage.

Another object is to provide an eg -grading machine, as set forth in the preceding objects, wherein the heavier eggs are sorted out'at the first weighing station, the lighter eggs being sorted out at successive weighing stations until all of the eggs have been sorted into predetermined weight ranges,

Another object is to provide an egg-grading machine, as set forth in the preceding objects, wherein an egg which is heavier than the weight for which the particular weighing unit is set will momentarily tilt the weighing unit by an amount which is insuflicient to cause the egg to roll off the weighing unit until the weighing unit is released so as to tilt further a sufficient amount to dump the eggupon a suitable receiver, such as a belt conveyor, the releasing being preferably eilected automatically by a movable stop mechanism in timed relationship with the operation of the mechanism which carries the egg from one weighing station to another until it is graded out.

Other objects and advantages of the invention will become apparent during the course of the following description of the accompanying drawings, wherein:

Figure 1 is a side elevation of a portion of an egg grading machine according to a preferred form of the present inventiomshowing the eggfeeding and sorting units thereof;

Figure 2 is a side elevation of the remainder of the egg-grading machine of Figure 1, showing the remainder of the egg-feeding unit.

Figure 3 is a top plan view of the portions of the egg-sorting and feeding units of the machine shown in Figure 1;

Figure 4 is a top plan view of the portion of the egg-feeding unit shown in Figure 2;

Figure 5 is a left-hand end elevation of the egg-grading machine shown in Figure 1;

Figure 6 is a vertical cross section through the egg-feeding unit taken along the line 6-6 in Figure 2;

Figure 7 is an enlarged fragmentary horizontal section through the reciprocating mechanism for the egg-carrier of the egg-sorting unit shown in Figures 3 and 5, taken along the line 1-4 in Figure 5;

Figure 8 is a vertical section through the egg carrier of the egg grading unit taken along the line 8--8'in Figure 1;

Figure 9 is an enlarged vertical section through the forward portion-of the egg-wighingunit and adjacent portion of the egg-feeding unit taken along the line 9-9 in Figure 3 and showing the cycle of motion performed by the egg carrier:

Figure 10 is an approximately vertical section through a portion of the egg-weighing unit taken along the line Ill-l0 in Figure 9 and showing details of one of the egg-weighing devices and its stop mechanism;

Figure 11 is a fragmentary vertical section through the egg-feeding unit taken along the line |lll in Figure 9; and

Figure 12 is an enlarged fragmentary plan view, partly in section, of a portion of the eggweighing unit of Figure 3, showing certain of the weighing devices and their movable stop mechin general, the egg-grading machine of this invention consists of an egg-feeding unit, generally designated l0, connected to an-egg-sorting unit, generally designated l3. The egg-feeding unit It includes a container remover portion, generally designated Ii and an egg-separating conveyor portion, generally designated l2. The

latter separates the eggs into rows, causes each egg to come to rest with its long axis approximately horizontal, and deposits the eggs on an egg rest. The eggs'are automatically picked up from these egg rests by an egg carrier in the eggsorting unit is and are successively deposited upon a series of egg-weighing devices. The eggweighing devices are adjusted so as to tilt when subjected to different weights of eggs, but to remain untilted if the egg is too light for the setting of the particular weighing device. When one of these devices tilts under the weight of a sumciently heavy egg, it dumps the egg onto a moving conveyor which conveys it to a collecting place for each grade of eggs according to their range of weight The egg-feeding unit In and egg-sorting unit l3 are described hereinafter in detail.

E -feeding unit Referring to the drawings in detail, Figures 1 to 4 inclusive show the container remover portion ll of the egg-feeding unit It as connected to the egg-separating conveyor portion i2 at its extreme left-hand end (Figures 2 and 4). Its right-hand end is supported on legs M which are secured to side plates it which in turn carry a platform It having a guide rail I! on one side thereof. Bolted to the side plates I! (Figure 2) are angle brackets it, these in turn being bolted to legs l9 which support the right-hand end of the egg-separating conveyor portion l2. Mounted between the angle brackets l9 and the legs l9 and secured by the same bolts is an angle member which passes transversely across the receiving unit II and passes through cut-away portions 2| in the side plates l5 thereof. Mounted between the side plates li -are the front and rear walls 22 and 23 respectively of a receptacle 24 having a bottom wall 25.

I Rising from the angle member 29 (Figure 2) and secured thereto as at 26 is an upright support 21 upon which are mounted a series of spaced parallel elongated stripping fingers 29, the pointed ends of which are directed toward the platform It. The fingers 29 are for the purpose of stripping the bottoms or flats 29 from the fillers or pocketed portions 30 of egg'containers 3| containing eggs 32. This is accomplished, as more fully described in connection with the operation of the machine, by placing the container 3| containing the eggs 32 upon the platform I 6 (Figures 2 and 4) and pushing it to the left, causing the pointed fingers 23 to penetrate the container 3| at the junction of the flat 29 with the filler 33, splitting the two apart. The flat 29 drops into the receptacle 24 while the eggs 32 are slid over the tops of the fingers 28. which are spaced apart an amount slightly less than the small diameter of an undersized egg. When the filler 30, with its bottom or flat 29 thus removed, has been pushed to the left-hand end oi the stripping fingers 29, it passes onward to the egg-separating unit i2. At this point, the filler 39 is lifted by the operator, the eggs 32 remaining upon the eggseparating portion I2 while the filler 30 is discarded. The egg-separating conveyor portion l2, shown partly at the left-hand ends of Figures 2 and 4 4 and partly at the right-hand ends of Figures 1 and 3, includes a frame formed by a' pair of vertical channel members33 mounted on the upper ends of the legs I9 and with their channel portions facing one another. The channel members 33 are interconnected at intervals by upper and lower angle members 34 and 35 respectively 7 (Figures 9 and 11) which in turn support upper and lower diverging guide rails 36' and 31 respectively. The lower flanges of the channel members 33 are separated from the lower angle members 33 by spacing members 33 (Figure 11) Bolted to the channel members 33 at their forward and rearward ends are pairs of aligned bearing bushings'39 and 43 respectively (Figures 1 to 4 inclusive) in which are journaled cross-shafts 4| and 42 respectively. Within the channels of the channel members 33 the shafts 4i and 42 near their opposite ends carry sprockets 43 and 44 respectively, these sprockets being encircled by endless chains 43. V

Mounted between the endless chains 45 at intervals therealong are rods 43 carrying capstanshaped rollers'or spools 41. The spools 41 are freely rotatable on the rods 46 and slidable axially therealong (Figure 11) andare provided with annular grooves 43 near the ends thereof engageable with guide rails 36 and 31.

The channel members 33 at their left-hand ends are .interconnected by a cross member 49 (Figure 9) which serves .as a support for egg-rests 59. The egg rests 53 consist of pairs of parallel rods 5i separated by gaps less than the small diameter of an undersized egg and having concavely bent portions 32 at their left-hand ends (Figure .9),- their right-hand ends being positioned approximately in line with the groove 43 of the spools 41 at the left-hand end of the egg-' separating portion l2. The channel members 33 at their left-hand ends (Figure 9) rest upon an angle member 53 which in turn is secured .to an angle member 54 at the right-hand end of the egg-sorting unit l3. The left-hand or rearward shaft 42 carries a second sprocket 55 on the outer end thereof, this in turn being encircled by an endless driving chain 53 which at its lower end encircles a lower sprocket 51 (Figured) mounted on a shaft I3. a

Elm-sorting unit The egg-sorting unit l3 is supported by legs 59 of angle cross-section interconnected by angle members 33 near their lower ends (Figures 1 and 5). One of the angle members 60 supports apair of outwardly-extending and overhanging brackets 8| which in turn support a platform 62. Bolted to the legs I9 at the right-hand end of the eggsorting unit l3 are bearing brackets 83 and 64 in which are journaled the opposite ends of the shaft 53. The shaft 53' also carries a large sprocket 65 (Figure 1) which is drivingly connected to a small sprocket 69 by an endless chain 61. I The small sprocket 66 is mounted on a shaft 68, one end of which is'journaled in a bearing bracket 69 bolted to one of the legs 59 at the left-hand end of the unit l3 and separated therefrom, by a spacing of the gear-box II. The reduction gear box 'II is F of conventional design, and its details'form no part of the invention. Its input shaft 12 carries a pulley 13 which is driven by a V-belt 14 from pulley 83 upon the output shaft 04 of an electric-)0 motor 85 bolted to avertical side member or side plate 00. By turning the handwheel 18 thebelts I I4 and 02 are caused to ride on diflerent diameters of the pulleys and .8l, thus varying the speed ratio between them. In this manner, the 5 sprocket shaft 42 of the egg-separating portion I2 is driven from the electric motor 85 through the speed-varyin unit 11 and reduction gear box".

Also mounted upon the shaft 88 is a pair'of member I2I is provided with a, weighing station cams 81 and 08 (Figures 1 and 5) which actuate an egg-carrier, generally designated 89, and forming a part of the egg-sorting unit I 3. The eggcan'ier 89 includes a vertically-reciprocable member 90 havin parallel flanges 9I and 92 (Figure 7) and a connecting web 99 in the form of a dove-tail slide. The latter. is reciprocable vertically in a guide block 94 correspondingly grooved as at 95. The guide block 94 is bolted interconnecting the side members 05 (Figure 1). The flange.92 (Figure 7) is provided with a boss .to a channel member 95 mounted between and 91 having a bore 98 of square cross-section in member 90. In a similar manner, the lower end of the rack shaft 99 carries a pin I02 on which is mounted a roller I03 engaging the edge of the cam 81. The latter, in rotating, efl'ects vertical reciprocation of the rack shaft 99. Bolted as at I04 to the top of the vertically reciprocable member 90 is a horizontal member I05 (Figures 1 and 8). The latter is roughly of T-shaped cross-section (Figure 8) and is provided with a horizontal cavity I05 into which extend guide ribs I01 of V-shaped cross-section.

Reciprocably mounted between the guide ribs I01 is a slide I08 having lateral V-grooves I09 for slidably receivingthe guide ribs I01. Bolted tothe lower side of the slide I08 are approximately Z-shaped egg-holders IIO having spaced slots I II extending through the lower flanges H2 and. webs III. The lower flange II2 thus slotted, forms bent fingers I I4 adapted to receive the eggs 92 when the slot III span the egg-rests andthe flanges move beneath and then upward past so the egg rests 50 as' shown by the arrows in Figure 9 and as described in connection with the operation thereof.

The upper side of the slide I08 is provided with rack teeth II5 which mesh with a pinion Iii mounted upon a shaft I I1 journaled in the flanges 9| and 92 of the vertically-reciprocable member 90 (Figure 5). The outer end of the shaft II1 carries a pinion II8 which in turn meshes with the teeth II9 on the rack bar 99. As a consequence, when the shaft 68 is rotated by the motor 85, the cam 88 causes the members 90 and I05 to rise and fall and at the same time the cam 01 reciprocates th rack bar 99 to rotate the shaft horizontally. This compound fingers II4 to move through the pathdescribed by the arrows in Figure 9, lifting the eggs 82 fro the egg rests 50, carrying them to the left, a d

depositing them upon the egg-weighing devices I20 (Figure 9). The latter operate as egg-selectors; sorting out eggs of the weight range for which the particular device i adjusted, and rejecting eggs lighter than this weight range, as described below.

Mounted on top of the egg-sorting unit I! and extending between the top of the channel member 95 and the angle member 54 (Figures 1, 5, 9 and 12) are spaced upwardly-facing channel members I2I which serve to support the eggweighing devices I20. The channel members I2I at their right-hand ends are aligned with the egg rests 50 (Figure 3) so that the eggs 92 are conveyed by the egg-carrier 89 to the egg-weighing devices I20 in a direct path. Each channel having a series of egg-weighing devices I20, four being shown, corresponding to four difierent grades of eggs selected according to their weights and served by four correspondingly-spaced egglifting fingers II4 on the egg holders I I0 attached to the slide I08 (Figure 1). The channel members I2I are provided with inwardly extending pivot pins I22 (Figure 10) having pointed ends which engage conical depressions I23 in the oppositesides of vertical blocks I24. Secured to the top of each block I24 is a forwardly projecting egg support I25 which is bent at its forward end to receive the eggs 92. Each egg support I25 is provided with an upstanding portion I26 which forms a stop to prevent the egg from rolling backward. The block I24 is also provided with a threaded horizontal hole ,I2'I for receiving the threaded stem of a counterweight I28; By screwing the counterweight I28 in or out of the hole I21, the block I24 may be caused to tilt when different weights d1 eggs 92 are placed upon the egg support I25. The egg-weighing devices I20 shown in the first row at the right-hand side of Figure 1 are so adjusted by their counterweights I28 that an unusually heavy egg 92 will tilt the block I24 around its pivot pins I22 and dump the egg, whereas a lighter egg will fail to tilt the block. The egg-weighing devices I20 in the second row, immediately to the left of the first row, are adjusted to tilt with a slightly lighter egg, those in the third row with a still lighter e g, and those in the fourth or extreme left-hand row to tilt with the lightest weight of egg. An egg which is too light to be sorted out by tilting one of the eggweighing devices'I20 in the first row of Figure 1 is automatically transferred to eachof the other rqws insuccession until it tilts one of the devices I20 andis dumped. Thus the egg carrier 89 serves as a transfer device for transferring the eggs successively from one weighing station to another until the egg reaches a station where its weight is sufllcient to tilt the device and cause ejection or dumping.

In order to revent premature dumping of the egg, each block I24 is provided with a forwardly extending pin I29 (Figures 9, 10 and 12) which is mounted above a movable stop arm I30 secured to a, rod or shaft I3I which extends lengthwise through the channel of each channel member I2 I. The arm I80 in its raised position (shown in dotted lines in Figure 10) is spaced slightly below the pin I29 so that the block I24 may tilt slightly before the pin I29 engages the movable stop arm II8 and cause the slide I08 to move to and fro I30. The outer end of each rod I3I carriesacrank motion causes the I arm I32 (Figures and 12) eizcepting the extreme right-hand rod 'I3I, which carries a bell-crank lever I33. The crank arms I32 and the vertical arm of the bell-crank I 33 are interconnected by a connecting rod I34 so as to rotate all of the rods I3I simultaneously and raise and lower all of the stop arms I30 simultaneously. ,In order to ac-, complish this the horizontal arm of the bell crank I33 (Figure 5) is connected to a vertical rod I 35, the lower end of which is connected to the horizontal arm of a bell-crank I30 which is pivotally I sorted out and dumped at-the' various weighing stations, each row of weighing devices I20 is provided with an adjacent endless belt conveyor I 40 mounted on pulleys HI and I42 (Figures 1, 3 and 5). The pulleys I are mounted upon shafts I43 carried by swinging frames I44 pivotally mounted upon a shaft I45 (Figures l and 5) journaled in bearing blocks I45 secured to a channel member I41. The latter is mounted on the side of the machine and welded or otherwise secured to the leg 59 (Figure 5). Each frame I44 is provided with a downwardly projecting arm I48. the end of which is provided with a bore I43. Secured to the channel member I41 and projecting horizontally therefrom are spaced threaded studs I50 which pass through the bores I49 and are provided with lock nuts I5I for locking the arms I48 in any desired positions along the studs I50. Each bore I45 is made sufficiently larger in diameter than the stud I50 to compensate for the arc of swing of the arm I40 and prevent binding 41 on the conveyor rods 46 of the egg-separating conveyor portion I2, which has been set in motion v of the stud I50 in the bore I45. This adiustment enables the slackness in the belt conveyors, I to be taken up as desired, and the belt conveyors I40 to be maintained in sufficiently taut condition.

The pulleys I42 which carry the oppositeends of the belt conveyors .I40 are keyed to or otherwise drivingly connected to a shaft I52 which is mounted in bearing blocks I53 bolted to the legs 59 at the opposite side of the machine from the pulleys I. Also. mounted upon the shaft I52 is a sprocket I54 which is drivingly connected by a sprocket chain I55 to a sprocket I58 (Figure 5) mounted upon a shaft I51. The shaft I51 is journaled in bearing blocks I53 bolted to the legs 59 (one only being shown). The opposite end of Operation In the operation of the egg-grading machine oi'this invention, the motor 35 is started. causing ,the'varions mechanisms to be driven. The eggs in their containers are placed upon the platform. It of the egg-feeding unit I0 (Figures 2 and 4) and slid toward the egg-sorting conveyor portion I2. Meanwhila'the upper surfaces of the pointed fingers 23 have been waxed so as to' reduce friction to a minimum. As the eggcontainers 3| are slid forward (Figure 2), theends of the pointed fin ers wedge t i ay b tween the flllers 20 and their flats or bottom 23, forcing the latter downward and detaching.

them so that they fall into the receptacle 24 from which they may be removed at intervals.

The bottomless fillers 30 with their eggs 32 are now moved still further forward until the first row of eggs therein is engaged by the rollers by the operation of the motor 85. The rollers or spools 41 as they move forward along the upper part of the conveyor portion I2 are caused to diverge by the diverging guide-rails 38 and at the same time they pull the bottomless fillers l0 forward, until all of the eggs are deposited upon the rollers or spools 41, whereupon the filler 30 may be lifted oil and discarded. In most instances: is found that the motion of the spools or'rollers.41 causes the filler 30 to ride upward out of engagement with the eggs 32 without the necessity of lifting it.

The eggs thus freed from'their fillers 30, are moved along by the conveyor rollers or spools 41 and at the same time are shifted from vertical to horizontal positions. The eggs at the end" of the run ofthe conveyor I2 are deposited by the spools or rollers "upon the egg rests with their long axes horizontal and extending transversely of the machine. This action separates the eggs into spaced rows and places them in positions where they are most conveniently carried member 30 to rise and fall and also causes the the shaft I51 from the sprocket I55 carries a bevel pinion I59 which meshes with a bevel gear I50 mounted on the rearward end of the shaft 50" at the point where 'it'emerges from the speedreducing gear box 1|. In order to guide the eggs 32 as they are dumped from the weighing devices I20 onto the belt conveyors I40, inclined guides or deflectors I6I are provided extendingalong one side of each belt conveyor I40 and secured to transverse bars I52 mounted on the channel members I2-I (Figure 9). To prevent damage to the eggs as they roll'across the belt conveyors I40 after a being dumped, buifers T53 are mountedadjacent Ihe opposite edges of the belt conveyors I40 and secured to transverse bars I04 also mounted on the channel members I2I.

rack bar 33 to rise and fall. This results in a compound motion of the slide I08 and the egg holders IIII connected thereto, the fingers II4 thereof describing the cyclical path shown by the arrows in Figure 9. Starting from the position shown in Figure9, the finger H4 is carried :upwardby the upward motion of the vertical -member 50 and horizontal member I05 and at the same time it is projected forward as shown in the dotted lines by the horizontal motion 'of the slide I08 by the rack'bar IIS'rotating the pinions H5 and 118. Thus, the first holder I" moves upward and forward into the dotted line position shown in Figure 9, whereupon it descends until the finger II4 passes beneath the egg rest 50. The fingers II4 then pass upward past the egg rest 50, lifting the eggs 32'off these rests and travelling in the return path-indicated by the arrows. As the slide I00 moves rearwardly. it is also caused to descend as shown by the arrows, with the fingers I I4 passing on opposite sides of the egg supports I25, causing the eggs 32 to be deposited upon the egg-supports vI25. The fingers '4 continue to move downward and then move rearward and upward, completing the cycle.

In this manner, a row of eggs is lifted from the egg rests and deposited upon the first row or station of weighing devices I20. The sufiiciently heavy eggs of the row overbalance the counterweights I20 and cause the blocks I24 to tilt slightly until their pins I29 engage the movable stop arms I30 (Figure Eggs which are not suificiently heavy to overbalance the counterweights I28, however, do not tilt. the blocks I24 hence these remain vertical. Meanwhile, the rotation of the cam I39 moves the rod I35 upward,.so as to rotate the rods I3I and swing the movable stop arms I30 downward (Figure 10). This action permits those weighing devices I which have been previously tilted by the eggs to tilt still further and to simultaneously dump their eggs onto the belt conveyor I40 whence they are conveyed to the rearward side of the machine and carried away by other conveying mechanism (not shown) to a candling or inspecting station.

The eggs remaining upon the first row or station of weighing devices I20 which were too light to overbalance the counterweights I28 remain in position on the egg supports I and on the second cycle of motion of the slide I08 and fingers I are lifted from the first ,row of weighing devices I20 by the second row of egg holders H0 and are conveyed rearwardly and deposited upon the second row of egg weighing devices I20 (Figure 1) following a cyclical path similar to that described above and shown by the arrows in Figure 9. At the same time, the first row of egg holders H0 and fingers H4 are moving over to the egg rests 50 for the second cycle, in the manner previously described, to convey another row of eggs to the first row of weighing devices I20. The eggs which are sufficiently heavy to tilt the weighing devices I20 in the second row do so and are dumped onto the second belt conveyor I40 and carried away when the movable stop arms I30 are again shifted by the second rotation of the cam I30. In this manner the eggs 32 are successively conveyed from one row or station to another of the weighing devices I20, the eggs sufficiently heavy for the setting of the particular row of weighing de vices being dumped at each station and the remainder carried on to the next station to the left of the previous row. At the last station, the weighing devices I20 immediately adjacent the block 94 (Figure 1) are so set that they will dump the eggs of the lightest weights and these are carried away by the final belt conveyor I40. The eggs, thus graded and carried away, are then candied and packed in a manner forming no part of the present invention.

While I have shown and described my invention in detail, it is to be understood that the same is to be limited only by the appended claims, for many changes may be made without departing from the spirit and scope of my invention.

What I claim is:

1. An egg-grading machine comprising a supporting structure having a plurality of spaced egg-weighing stations arranged in succession thereon, an egg-weighing device disposed at each station and including a weighing element responsive to the weights of the eggs in excess of a predetermined weight for ejecting said eggs, 9. horizontally movable conveyor mounted adjacent each weighing station in the space between successive stations and immediately below the level or said weighing element for carrying away the 10 elected e s. an egg transfer device havin eggholders thereonmovable between said weighing stations for transferring eggs therebetween, said ejected egg conveyors being mounted for travel transversely to the direction or travel of said egg transfer device, the weighing devices at said stations being constructed and arranged to eject eggs exceeding a different predetermined weight for each station, and power-actuated mechanism operabiy connected to said egg transfer device and arranged to move said egg holders approximately in inverted U-shaped paths from station to station, said paths including downwardlydirected loop portions extending downwardly to said weighing elements at the corresponding stations and also including substantially horizontal forward and return portions and passing over and extending between the upper ends of said loop portions above said conveyors at a height sufllcient for clearance between said egg holders and the ejected eggs traveling transversely on said conveyors.

2. An egg-grading machine comprising a supporting structure having a plurality of spaced egg-weighing stations arranged in succession thereon, an egg-weighing device disposed at each station and including a weighing element responsive to the weights of the eggs in excess of a Predetermined weight for ejecting said eggs, a horizontally movable conveyor mounted adjacent each weighing station in the space between successive stations and immediately below the level A of said weighing element for carrying away the ejected eggs, an egg transfer device having egg holders thereon movable between said weighing stations for transferring eggs therebetween, said ejected egg conveyors being mounted for travel transversely to the direction of travel of said egg transfer device, the weighing devices at said stations being constructed and arranged to eject eggs exceeding a diiferent predetermined weight for each station, said egg transfer device being arranged to transfer unejected eggs successively from station to station for weight-testing at each station, and power-actuated cam-operated mechanism operably connected to said egg transfer device, said mechanism including a cam configured to move the egg transfer device in an upand-down direction and a cam configured to move the egg transfer device in a substantially horizontal direction, said cams being arranged to move the egg transfer device and its egg holders approximately in inverted U-shaped paths from station to station, said paths including downwardly-directed loop portions extending downwardly. to said weighing elements at corresponding stations and also including substantially horizontal forward and return portions extending between the upper ends of said loop portions and passing over and above said conveyors at a height sufficient for clearance between said egg holders and the ejected eggs traveling transversely on closely adjacent their respective conveyors, an egg transfer device for transferring the unejected eggs successively from station to station for weight testing at each station, movable stops engageable with said weighing devices "for temporarily restraining said weighing devices from tilting to their egg-ejecting positions, each stop in its stopping position being spaced away from its respective weighing device suflicient to permit a preliminary tilting movement of the egg support thereof but insufficient to eject an overweight egg resting upon said egg support, mechanism for actuating said egg transfer device to move said movable stops in timed relationship with said egg transfer device at each weighing station whereby to deposit all eggs which are overweight for the particular station simultaneously on its respective conveyor.

4. An egg-sorting device comprising a supporting structure having a plurality of egg-weighing stations thereon, a plurality of tiltable eggweighing devices mounted in succession upon said structure at said stations and responsive to the weights of eggs in excess of a different predetermined weight at each station for ejecting eggs deposited thereon exceeding said predetermined weight for said station, a movable conveyor mounted adjacent each weighing station for carrying away the ejected eggs, said egg-weighing devices having egg supports positioned closely adjacent their respective conveyors, an egg transfer device for transferring the unejected eggs successively from station to station for weight testing at each station, movable stops engageable with said weighing devices for temporarily restraining said weighing devices from tilting to their egg-ejecting positions, each stop in its stopping position being spaced away from its respective weighing device sufficient to permit a preliminary tilting movement of the egg support thereof but insuflicient to eject an overweight egg resting upon said egg supportcam-operated power-driven mechanism for actuating said egg transfer device to move the eggs from station'to station, and mechanism for simultaneously releasing said movable stops in timed relationship with said egg transfer device at each weighing station whereby to deposit all eggs which are overweight for the particular station simultaneously 'on its respective conveyor.

5. An egg-sorting device comprising a supporting structure having a plurality of egg-weighing -stations thereon, a plurality of ti-ltable e88- weighing devices mounted in succession upon said structure at said stations and responsive to the weights of eggs in excess of a different predetermined weight at each station for ejecting eggs deposited thereon exceeding said. predetermined weight for said station, a movable conveyor mounted adjacent each weighing station for carrying awa the ejected eggs, said egg-weighing devices having egg supports positioned closely adjacent their respective conveyors, an egg transfer device having egg-holdersthereon for transferring the unejected eggs successively from station to station for weight testing ateach station, movable stops engageable with said weighing devices for temporarily restraining said weighing devices from tilting to their egg-ejecting positions, each stop in its stopping position being spaced away from its respective weighing device sufficient to permit a preliminary tilting movement of the egg support thereof butinsufllcient to eject an overweight egg resting upon said egg support, mechanism for actuating said egg transfer device to move the eggs from station to station, and mechanism for simultaneously releasing said movable stops in timed relationship with said egg transfer device at each weighing station whereby to deposit all eggs which are overweight for the particular station simultaneously on its respective conveyor, said egg transfer device actuating mechanism being arranged to move saidegg-holders approximately in inverted U-shaped paths from station to station, said paths including downwardly-extending loop portions at the corresponding stations and substantially horizontal forward and return portions joining said loop portions above said station.

CLARENCE PAGE.

REFERENCES crrEn The following references are of record in'the file of this patent:

UNITED STATES PATENTS 

